Well, it could be about Percy's unique powers inherited from Aether and Hemera. Maybe he can control light and darkness in new ways. He could use the powers of Aether, like the upper air or the heavens, to fly or teleport. And the powers from Hemera, the day, might give him enhanced strength during daylight hours.
Another possibility is that the fanfiction focuses on Percy's relationships. His friends may be skeptical or even afraid of his new powers. His romantic relationships could also be affected. For example, Annabeth might have a hard time understanding the changes in Percy. And Percy may have to deal with new enemies who are interested in his unique heritage.
His powers would be much more extreme. Instead of just controlling water like he does as a son of Poseidon, he could control light and air elements. His connection to Aether could give him the ability to manipulate the very fabric of the upper atmosphere. And from Hemera, he might have the power to bring instant daylight or even manipulate time related to the day - night cycle.
Well, a great idea for 'Percy Jackson Son of Aether' fanfiction would be to explore his relationship with the other gods. Since Aether is an important and somewhat mysterious entity, the gods might be either jealous or intrigued by Percy. He could face challenges from the gods who don't want a new 'son of' disrupting the status quo. Also, his adventures in the underworld could be different. Maybe he can use his Aether - related powers to see things that are usually hidden there, like secret passages or lost souls that hold important secrets.
The Titans could be great antagonists. They might see Percy as a threat to their plans of regaining power. Since he has the power of Aether, they could fear that he'll be able to stop them in ways other demigods can't. Another option could be some dark demigods who are jealous of Percy's connection to Aether and want to steal his powers for themselves.
The plot could center around Percy's transformation into the 'Son of Chaos'. He might have to face challenges that test his loyalty to his old friends at Camp Half - Blood while also adapting to his new role. He may also encounter new characters who are either allies or enemies in this new phase of his life. It might also involve a power struggle within the chaotic realm where he has to prove himself worthy.
One idea could be Percy having to master the power of Aether in a new realm filled with strange creatures. He might face challenges that test his loyalty to his friends and his understanding of this new power. Another plot could involve Percy using Aether to save Camp Half - Blood from a threat that normal demigod powers can't handle. Maybe he has to make a sacrifice to fully embrace his role as the Champion of Aether.
Well, the plot could be centered around Percy's newfound ability to see through things like Superman. This could give him an edge in battles against the monsters that lurk in the shadows in the demigod world. He might also start to exhibit heat vision, which could be both a blessing and a curse. On one hand, it could be a powerful weapon against his foes, but on the other hand, he has to learn to control it so as not to harm his friends. The fanfiction could explore how he trains with the help of the demigod trainers and perhaps some of Superman's allies from his own world to master these new powers.
One possible plot could be that the son of Artemis discovers a threat to the demigod world that is related to his mother's domain. He then seeks out Percy for help because of Percy's reputation. Together, they embark on a journey to find a magical artifact that can stop the threat.
A possible plot could be Percy discovering his Asgardian heritage and being taken to Asgard. There, he has to prove himself worthy among the Asgardians while also trying to figure out how his demigod powers interact with his new - found Asgardian abilities.
A common theme is the exploration of their unique relationship. Writers often focus on how Percy and Hemera complement each other.
Perhaps the story could be about Percy facing discrimination from other demigods due to his new relation to Pluto. He is then forced to prove himself not only as a hero but also as a worthy adopted son of Pluto. He trains hard to master the powers and knowledge that come with his new status. He also tries to find a way to use his underworld - related abilities for the good of all demigods, like using his connection to the dead to get information about future threats to the demigod world.